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Discussion Starter · #1 ·
what a good trail and lake set-up for 900 WITH SLP pipe, carbed, with kickass filters? also is 460/470 close for the jetting i need at 1500ft?

gearing is 25/41. using heavy hitter weights also.


also, does anyone have a good set-up for riding the mountains at 8-10,000 feet, (bighorns)?
 

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<div class='quotetop'>QUOTE (Rosko18 @ Jan 14 2007, 12:43 PM) <{POST_SNAPBACK}></div>
no one runs a pipe on 03 zr 900?[/b]
Alot of people are running an SLP single on their 9's. Very few are running them without the airbox. Even fewer on this site ride at 10,000'. Might want to try snowest.com. Hard to guess how much you'll need to jet up with filters but 460/470 sounds on the lean side to me at 1500'. I wouldn't run any leaner than that WITH the airbox. By comparison, I'm running SLP's Performance Package(porting, single pipe, air box, and V-Force III's) at 600'-1900' and I'm running 500/540 with a Tempaflow. You'll need somewhere around 70g in the Heavy Hitters(depending on springs and helix combo) to get the r's up where the pipe runs best-7800 to 7900rpm. You're also going to need to gear down for the Big Horns-22/41 w/72p chain would work fine and be the cheapest since you already have a 41t bottom gear.
 

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Discussion Starter · #6 ·
460/470 sounds lean at 1500ft? werent stock jets 430's? when i ran SLP pipe on my pro x, i ran stock jetting and that was even rich.....
 

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<div class='quotetop'>QUOTE (Rosko18 @ Jan 14 2007, 11:33 PM) <{POST_SNAPBACK}></div>
460/470 sounds lean at 1500ft? werent stock jets 430's? when i ran SLP pipe on my pro x, i ran stock jetting and that was even rich.....[/b]
It sounds lean without an air box. Typically going from box to filters requires going up 4-5 sizes on the mains. The old MXZ 670's required 8-10 sizes richer! SLP recommends 460/470 with NO airbox mods at 0-20 degrees at sea level. 430/440 at 2000'. They suggest up one size if shelf removed or their airbox mod and up 2 more sizes if using ethanol or MTBE. Granted these are SAFE recommendations but when you run filters it's hard to guess exactly what you'll need. Much cheaper to change jets than pistons, and it's pretty easy to change them without the box. I'd start out with at least 490/500's and go from there. 900's like fuel-no need to run it on the edge. Also, Do not run the needle any lower than the stock #4 position-I'd start at #5 without the box as these motors are a little "hot" in the midrange anyways. You've spent alot of time and effort on your project so take the time to get it right. You're not going to "guess" the perfect setup so start rich and work your way down. Try changing jets on this:
[attachment=60745:motor.jpg]
 

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